The Longfield 30-Spline CV kits (303401-1-KIT and 303347-1-KIT) are made out of 100% chromoly and are precision polished to remove any imperfections that may cause stress risers. The internals of the birfield are also made from 4340 chromoly and are dual heat treated for superior strength.
The CVs also have a shallow relief near the splines on the stub shaft known as a Machined Spline Saver. The Machined Spline Saver eliminates stress concentrations caused by grooving from the tool that makes the splines on the stub shaft. The stress concentration from the spline groove is a common failure point on birfield stub shafts.
Axle shafts are also 4340 chromoly steel, 414mm and 770mm long.
The 303401-1-KIT is covered by a 12 month limited warranty. All parts used in a competitive racing environment are excluded from this warranty.
The 303347-1-KIT is covered by a limited lifetime warranty. All parts used in a competitive racing environment are excluded from this warranty.
The Gun Drilled CV has a M8 grease zerk at the end of the stub shaft and is gun drilled through the center of the birfield to allow for grease to pass through the zerk fitting and into the internals. This will save you precious time by eliminating the need to disassemble your axle just to service your birfields.The Gun Drilled kit includes Trail-Gear chromoly inner hub gears at no additional cost!
NB: Inner hub gears supplied only work with manual locking hubs.